I can’t imagine a more un stimulating garden for kids than the one shown. What of ladybirds, butterflies, treehouses, dens ? Why don’t you just Astro Turf it and completely eradicate nature & be done with it.
Discussion
It's entirely possible to have a lawn that's good for soccer and running around barefoot & still have garden beds for flowers & food, & a shady corner with fruit trees or pecan trees & a tree house or whatever. It's not some sort of evil to want a nice comfortable tick free lawn.